Speed-indicator.



W. MORELL.

SPEED INDICATOR.

APPLICATION FILED NOV. 18, 1910.

1,053,202. Patented Feb. "128, 1913.

Witnesses- 43% fication.

WILHELM MORELL; OF LEIIPZIG, GERMANY.

sPnEn-Inmoiu'on.

Specification of Letters Itatent.

Application and November 18, 1910. Serial 1%. 593.023.

it; all whom, it may cont-em:

Be it known that I, WILHELM lllonnnn,

a sub'ect of the Kin of Prussia. and resident of Leipzig, Germany, have invented a neW and useful Improvement in Speedlndicators, of which the following is a speci- This invention relates to a speed indicator, in which a fly-mass operating after the principle of the circular or rotary pendu-' lum is made use of.

My improvement consists in transmitting the movement from the fly-mass to the pointer of the indicator and not directly, but indirectly, by the mediation of elasticor yielding parts which are adapted to compensate or render harmless the shocks or pushes occurring particularly in such apparatus or machines as explosion motors and similar engines.

Referring to the accompanying drawing: Figure 1 is a vertical longitudinal section through one form of construction of my improved indicator. Fig. 2 is a vertical crosssection. Figs. 3, 4, 5 are some details, which will duly he referred to hereinafter.

Some known parts and combinations of parts, such as the counting wheel-work, the dial, and similar components of-the apparates are left away because they are not in any connection with the present invention.

The shaft (1, Fig. 1, serves for transmitting the motion from the rotating part Whose rotary speed shall be measured to the iudicater. The latter has a shaft (5 connected by bevel-wheels b c with the shar't a. The shaftv (l is surrmindcd by. and carrios,the flywheel like fly-mass c which may swing upon and around a. horizontal axis crossing the shall; if, and which is under the action of a spring: 1" tending to hold the fly-mass in an oblique position. The shaft :1 has also a grooved roll g which displaccable upon said shaft and is supported by a spring (1 surrounding the saine. A rod f, Fig. 2, hinged at. one end to the roll and at the two parts with each other. 1

Into the groove of the roll 5 projects a pin it which is adjustably attached to the forked end of abent arm 2' provided with a sleeve j which is located upon an axle (i held by arms 9 a forming parts oi" the frame (Figs. 3, i and 5). To the sleeve 7' other end to the liy-ni'ass c connects these cured a spring a, the two ends of which form a fork having between its prongs a pin the pin ii, the arm a,

. fork, move the pin m,

m Fig. i) projecting forth from a toothed sector Z also held by said axle i The sector Z is in mesh with a pinion 0 fixed to the shaft 71 of the pointer 72- The pinion o is connected with a cog-Wheel of considerably larger diameter which forms part of a train of wheels serving for actuating a fiy or wind-brake a (Fig. 3) such as known in the art of clock-making. The fly zconsists of a small metal-plate, which, when rota ting,

is subjected to the resistance of the air which in its turn acts like a brake and prevents a too-quick rotation of the train of wheels in general and of the pinion oin particular. In other words; the pointer r is prevented from jerking. As soon as the shaft a and thus also the shaft. (3 commence to rotate. the rotating fly-mass 0 changes, c. diminishes its inclination with respect to the horizontal plane containing the axle of that mass, and consequently the roll 9' is drawn downward by means of the bar 7. The roll 9 moves the sleeve and the spring n, and the ends of the latter, e. the the sector Z. the pinion. 0, the shaft 7) and the pointer T, which thus indicates upon the dial (not shown) the speed of the explosion motor or some other engine or apparatus.

Smce thespecd indicator in question is in tended chiefly for apparatus in which a quick succession of shocks or pushes occurs, as in explosion motors, the object of the inrcntion is to prevent the pointer from being affected, for instance oscillated, by said shocks or pushes, and I attain this object by transmitting the motion to the pointer not by rigid parts, but by elastic ones, such as the forloforming ends of the spring at. There is, of course, a certain inertia in the parts 121-, Z, 0, p. 7*, and owing thereto these parts do not instantly give Way to every impulse or pressure oi. the spring in in one or the other direction. 'lherc results always a medium pressuredependent, of course, upon the spcedf the position of the pointer r chan also, but Without any jerk, oscillation or tnc like, and also at a uniform rotation oi the motor the pointer does not jerk or oscillate, but it stands quiet and allows of an easy, convert-- iont and distinct reading.

To adjust the pointer upon zero when the apparatus is at rest, I have provided two means, the one for the coarse or initial ad" justment, the other for the fine or ultimate Patented Feb. 1 8, 191 3.

As soon as the speed. changes,

lit)

adjustment. The first is brought about by suitably displacing the pin it within the forked free end of the arm 2', and the other is effected by means of a screw 1: (Figs. 2, 3) adapted to act upon a laterally projecting arm of the sector 1.

Having now described my invention, what I desire to secure by a patent of the United States is 1. In a speed-indicator havin a fly-mass operating after the Circular. pen ulum princlple, the combination with said fly-mass, of a pointer, a. plurality of transmitting-means between the said fiy-mass and said pointer; said transmitting means comprising an elastic fork, and a pin projecting into said fork, for the purpose as described.

2 In a speed-indicator having a fiy-mass operating after the circular pendulum princlple, the combination with said fly-mass of means for rotating the same, a pointer, a plurality of means for transmitting the movement of said fly:mass to the pointer, said transmitting means comprising a fork sector, and a spring establishing a connection between this pin and said arm and adapted to transmit the movements of the said pin elastically to the said arm, for the purpose as described.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

WILHELM MORELL.

\Vitnesses RUDOLPH FRICKE, ALBERT R. MonAwE'rz. 

